SSC JE 2019-20 Technical Quiz 20

An amplifier is used to obtain

Which of the following represents the quality factor of a series RLC circuit?

A 600-turn coil has a resistance of 7 ohms and an inductance of 0.8 H. If one-fifth of the turns are removed, then determine the new inductance (in H).

In a 3-phase induction motor a balanced three phase supply is with electrical angle separation

The hysteresis loop for materials having high retentivity is

A synchronous motor has better power factor than an induction motor. This is due to __________

At starting, the winding of a 220 V, 50 Hz split-phase induction motor has the following values:
Main winding R=10 Ω; X_L = 25 Ω
Stator winding = R=25 Ω; X_L = 15 Ω
 A 160μF capacitor is connected in series with the starting winding of the motor. The phase displacement between I_m & I_s is

An arc is produced when the switch of a high-voltage and large-current circuit is

A conductor of length 0.6 m is situated at the right angle to a uniform magnetic field of flux density 4 Wb/sq. m. The conductor is moving with a velocity of 50 m/s. Calculate the emf induced (in V) n the conductor.

Determine the value of current (in mA) required for the full-scale deflection of a voltmeter when the sensitivity of the voltmeter is 125 Ohms/Volt.